Baseline Systems BHM Series Hydrometer - Manual (Page 7)

Hydrometers Operation and Maintenance Manual •
7
Specifications, Cont.
NETAFIM USA HYDROMETERS WITH ELECTRICAL OUTPUT
Netafim USA Hydrometers are equipped with electrical output devices that combine the high reliability
of hermetically sealed, magnetically driven registers with a wide variety of electrical output options.
Hydrometers (measuring instruments) provide electrical output information about the flow of water.
When more than just the traditional register is needed, they also provide the solution for automation and
communication with controllers, electronic devices and other water delivery systems.
Netafim USA has three types of transducer outputs available which provide three levels of resolution:
• Reed Switch (RS) Register - low frequency pulse output for functions related
primarily to recording volume.
• Photo Diode (PD) Register - standard frequency pulse output (open collector) for
functions such as rate of flow and recording total volume.
• Photo Diode (PDH) Register - high frequency pulse (open collector) for functions
such as rate of flow and recording total volume.
ELECTRICAL OUTPUT SPECIFICATIONS
REED SWITCH (RS) REGISTER
The flow rate is transmitted as periodic electrical pulses are measured by the magnetic pointer in
the dial face. The hydrometer is configured to transmit a pulse according to a pre-defined volume
interval. The following summarizes the available volume intervals for various hydrometer sizes in
either gallons or cubic meters.
• A three pointer register, with a magnet installed on one of the pointers.
• Output definition: Volume Output
• Output type: RS – Reed Switch and PD – Photo Diode
The sensor is installed in a transparent plastic cover that can be mounted on the register in one of
three positions with the pointer facing the magnet. Three values of electrical output are available
in 1:10:100 ratios.
Manufacturer
Recommended
Register Type
Recommended Register
Transducer Outputs
Baseline Basestation PDH
Hunter ACC 2-Wire PDH
Rain Bird MDC & Maxi RS
Signature All Models RS
Toro
Sentinel PDH
TDC 2-Wire PDH
Rainmaster All Models
RS (1” to 4”)
PD (6”, 8”)
Tucor
Flowmaster
PDH
& RK Series
Motorola All Models RS
Controller
Model